Difference between revisions of "MRS GREN"

Revision as of 10:48, 2 September 2018

MRS GREN is a memory tool to help remember what makes something alive.

If something is Alive is must be able to:


Move - A uses its legs and wings to move in search of food. Respire - A fly gets energy from the food they eat. Sense - A fly can see with its eyes and taste with its feet. Grow - A fly begins its life in an egg and grows into a maggot before becoming a fly. Reproduce - Flies can mate to make new flies. Excrete - A fly breaths out waste gas and leave droppings of waste material. Nutrition - Flies must take in new material by eating food.	Move - The leaves of an oak tree will move to aim toward the sun. Respire - Trees make their own food and send it around the tree to be used for energy. Sense - Oak trees sense the change in temperature and amount of light and lose their leaves in winter. Grow - Oak trees begin as a small seed and grow up to 20 metres tall. Reproduce - Oak trees make seeds called acorns which can grow into new oak trees. Excrete - Oak trees let out waste gases. Nutrition - Oak trees take in minerals and water the soil.

MRS GREN is an acronym used to help remember the criteria for something to be considered alive.

MRS GREN is a mnemonic, which is a tool to help remember something.

MRS GREN stands for:

Movement - All living creatures can change direction when moving.
Respiration - All living creatures can get energy from food.
Sensitivity - All living creatures can respond to changes in the environment.
Growth - All living creatures can get bigger by taking on new material.
Reproduction - All living creatures can make copies of themselves.
Excretion - All living creatures can get rid of waste materials.
Nutrition - All living creatures can take on new materials for movement, growth and repair.


Movement - This micro-organism has a tail called a flagellum which it can use to swim. Respiration - This micro-organism makes its own food and uses that food for energy. Sensitivity - This micro-organism can sense light using an organelle called an eye spot. Growth - This micro-organism gets bigger before dividing. Reproduction - This micro-organism divides to make two identical copies of itself. Excretion - This micro-organism gets rid of waste with a contractile vacuole. Nutrition - This micro-organism takes in nutrients from the water around it.	Movement - Respiration - Sensitivity - Growth - Reproduction - Excretion - Nutrition -

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 ===Examples===
+{| class="wikitable"
+|-
+|[[File:Microbe.png|center|400px]]
+|[[File:MuscleCells.png|center|400px]]
+|-
+| style="height:20px; width:400px; text-align:left;" |
+: '''Movement''' - This micro-organism has a tail called a [[flagellum]] which it can use to swim.
+: '''Respiration''' - This micro-organism makes its own food and uses that food for energy.
+: '''Sensitivity''' - This micro-organism can sense light using an organelle called an [[Eye Spot|eye spot]].
+: '''Growth''' - This micro-organism gets bigger before [[Cellular Division|dividing]].
+: '''Reproduction''' - This micro-organism [[Cellular Division|divides]] to make two identical copies of itself.
+: '''Excretion''' - This micro-organism gets rid of waste with a [[Contractile Vacuole|contractile vacuole]].
+: '''Nutrition''' - This micro-organism takes in nutrients from the water around it.
+| style="height:20px; width:400px; text-align:left;" |
+: '''Movement''' -
+: '''Respiration''' -
+: '''Sensitivity''' -
+: '''Growth''' -
+: '''Reproduction''' -
+: '''Excretion''' -
+: '''Nutrition''' -
+|}